text: Roberts worked at the Adden Brookes Hospital Forvie site in Cambridge (UK) for Parke Davis.
  Roberts held the position of senior vice president and Head of Chemistry at F. Hoffmann-La Roche in Basel, Switzerland. He further contributed his expertise as a director and Head of Chemistry at AstraZeneca R&D in Montreal, Canada. He was an adjunct professor in the Department of Chemistry at McGill University, Montreal, Canada. 
  Roberts was the President and Chief Science Officer at Kémia, a drug development company located in San Diego, California.  He currently serves as a professor in the Departments of Chemistry and Molecular Medicine at Scripps Research in La Jolla, California.